This paper investigates the quantum effects on the evaporation of Primordial Black Holes (PBHs) and their contribution to dark matter. The study goes beyond the semiclassical approximation, considering quantum corrections due to the memory burden effect, which suppresses the black hole evaporation rate by the inverse power of its entropy. These quantum effects significantly increase the lifetime of PBHs, making them viable candidates for dark matter, especially for masses around $10^9$ grams. However, the paper also considers the possibility of PBHs decaying into fundamental particles, contributing to dark matter. The analysis explores two scenarios: PBHs evaporating before Big Bang Nucleosynthesis (BBN) and PBHs remaining stable until today. The memory burden effect is shown to open up a wide range of parameter space in the initial PBH mass and fundamental dark matter mass plane that respects the correct relic abundance. The paper also discusses the constraints from observations such as gamma-ray emissions and cosmic microwave background (CMB) anisotropies, which limit the possible mass ranges for PBHs to be dark matter candidates. The study finds that for certain mass ranges, PBHs can survive until today and contribute to the dark matter relic abundance. The quantum corrections to the evaporation process are shown to significantly extend the lifetime of PBHs, allowing them to remain stable and contribute to dark matter. The paper also considers the possibility of PBHs acting as dark matter due to their cold, non-interacting nature, and calculates the contributions of additional particles produced from PBH decay. The results indicate that the quantum effects on PBH evaporation can lead to a viable dark matter scenario, where PBHs with masses around $10^9$ grams can be the sole dark matter candidate. The paper also highlights the importance of considering both the evaporation products and the stable PBHs in determining the dark matter relic abundance. The findings suggest that the inclusion of quantum corrections can significantly alter the constraints on particle dark matter and PBH parameter space, providing a more comprehensive understanding of the role of PBHs in dark matter scenarios.This paper investigates the quantum effects on the evaporation of Primordial Black Holes (PBHs) and their contribution to dark matter. The study goes beyond the semiclassical approximation, considering quantum corrections due to the memory burden effect, which suppresses the black hole evaporation rate by the inverse power of its entropy. These quantum effects significantly increase the lifetime of PBHs, making them viable candidates for dark matter, especially for masses around $10^9$ grams. However, the paper also considers the possibility of PBHs decaying into fundamental particles, contributing to dark matter. The analysis explores two scenarios: PBHs evaporating before Big Bang Nucleosynthesis (BBN) and PBHs remaining stable until today. The memory burden effect is shown to open up a wide range of parameter space in the initial PBH mass and fundamental dark matter mass plane that respects the correct relic abundance. The paper also discusses the constraints from observations such as gamma-ray emissions and cosmic microwave background (CMB) anisotropies, which limit the possible mass ranges for PBHs to be dark matter candidates. The study finds that for certain mass ranges, PBHs can survive until today and contribute to the dark matter relic abundance. The quantum corrections to the evaporation process are shown to significantly extend the lifetime of PBHs, allowing them to remain stable and contribute to dark matter. The paper also considers the possibility of PBHs acting as dark matter due to their cold, non-interacting nature, and calculates the contributions of additional particles produced from PBH decay. The results indicate that the quantum effects on PBH evaporation can lead to a viable dark matter scenario, where PBHs with masses around $10^9$ grams can be the sole dark matter candidate. The paper also highlights the importance of considering both the evaporation products and the stable PBHs in determining the dark matter relic abundance. The findings suggest that the inclusion of quantum corrections can significantly alter the constraints on particle dark matter and PBH parameter space, providing a more comprehensive understanding of the role of PBHs in dark matter scenarios.